Pumping device



INVENTOR. 7mm/L fi im W A TTORNEY Patented Feb.` 3, 1931 PATENT OFFICEEMANUEL A. SMITH, F HAYWABD, GAIIFORNIL rUurrNe DEVICE Applicatinn led.Tune 18, 1928. Serial No. 286,093.

The invent-ion relates to a Imethod and apparatus for increasing theein'ciency. and range of use of suction pumps for liquids.

An object of the invention is. to provide a 6 method whereby a suctionpump may be utilized in raising a liquid through an appreciably greaterheight than the atmospheric lift height for the liquid.

Another object of the invention is to provide a device of the characterdescribed in which the liquid being lifted is itself utilized i'n thecarrying out of the method.

A further object of the invention is to provide a device of thecharacter described which is articularly applicable for use with acentri ug'al pump andvother pumps arranged for eifectin a continuousflow.

A still further o ject of the invention is yto provide particularlysimple and effective apparatus for carrying out the invention.-

he' invention possesses other objects and features of advantage, some ofwhich, with the foregoing, will be set forth in the following|description of the preferred form ofthe invention which is illustratedin the .drawings accompanying and forming part of the specification. Itiste be understood, however, that variations in the showing made by thesaid drawin s and descriptions may be ado ted within tlie scope of theinvention as set orth in the claim. Referring to said drawin Figure 1 isa side view o an installation embodying the invention.

Figure 2 is an enlarged sectional view of a portion of the apparatusused.

As herewith particularly illustrated, the device of my invention isapplied in connection witha centrifugal pump 3 of a usual type having adischarge pipe 4 and a suction pipe 6. The suction pipe 6 extendsdownwardly through a well caslng'? and into the water at 4the lower endthereof and is provided at its bottom end with a suitable one-way vfootvalvel 8 through which the water from thev well is arranged to be drawn`into the suction pipe 4 is arrange to take place under pressure into astand-.pipe or tank 9 preferably 5 having its outlet 11 above the top ofthe Y tank 9, and a pipe. Discharge from the pump for a purpose to behereinafter brought out. f

An injector 13 is interposed in the suction pipe 6 above and adjacentthe foot valve .8,

.and said injector is connected with the pump discharge pipe v4 by meansof a pipe 14 and a T 16, the pipe 14 preferably being disposed in thecasing 7 beside the pipe 6 and of somewhat smaller size than is thelatter pipe. A regulating valve 17 is provided in the discharge pipe 4between the T 16 and lpressure gage 18 is preferably connected wit thedischarge pipe between the T and the pump. The injector 13 is arrangedto discharge upwardl in the ipe jwhereby its effect is arrange to be aded to the suction created by the pump in the pipe.

With the present arrangement, when the pump 3 is operating to dischargewater into the tank 9 under pressure, a certain portion of the waterpassing through the discharge pipe 4 will be diverted into the pipe 14and so through the injector 13 and bac into the` suction pipe 6, thedischargeof this re-circulated water from the injector producing aninjector effect which is operative indepen ently of and in addition tothe suction 1n the pipe 6 for drawing water through the foot. valve 8.The amount it will now be clear, is arran ed to be controlled b aregulation of the ischarge pressure in t e pipe 4 by means of the valve17,

the-discharge opening of the injector being s constant.

As is well known, the maximum suction lift of a pump is limited by thedensity and tem rature of a liquid to be raised and the of waterrecirculated, 9

eiiiciency of the pump, to a value usuallly w somewhat below thirtyfeet, with the resu that suction pumps at the ground surface are onlyeffective for shallow wells. Yet owing to. the higher. eiliciencies ofcontinuous flow pumps, and particularly centrifugal pum s, such are usedwherever possible, and in t e case of deeper wells it is a commonpractice to provide a pump well for disposing a pump,

within its suction lift distance 0f thelttir in the well. Inaccordnmlwth .thp'l''li-. inventidn, however, e pumpmly be used fordrawing water from a well considerably exceeding in depth the suctionlift limit without necessitating a disposal of the pumpbelow the groundlevel, it being merely necessary to appropriately adjust the dischargeof the inj'ectonfor effecting a raising of the water Within the suctionlift range of the pump. Since in the present method, some ofthe pumpedliquid is itself utilized for effecting the desired injection of waterinto the suction pipe, the pump is the only part of the device whichrequires power for its operation, for the discharge pressure -created byit is utilized in effecting the in-- jector operation, and a minimum ofequipment is thus required.

By way of example as to the operation of the apparatus, it is found thatwater may be raised from a seventy foot well when the gage 18 registersabout thirty pounds. above atmospheric pressure. It will, of course, beobvious that a balanced adjustment of the valve 17 is preferably madefor the lowest possible operating pressure to effect a maximum deliveryof water to the tank. Since the injector circuit is in constantcommunication with the tank 9 through the pipe 4, and the tankdischarges above the pump, the pumping circuit will always be primed fora starting of the pump. lVhen the pump is to be started, the valve 17would be closed Somewhat 'to increase the discharge pressure until theflow is established.

The Water operated injector 8, it will now be noted, has beenparticularly designed for use with the present system and apparatus,

an important feature thereof being its extreme simplicity of structure.As disclosed, the injector comprises a generally tubular body member 21carrying the foot valve 8 at the lower end thereof and arranged to besecured to the pipe 6 by means of a member 22 formed generally as a pipeunion of a usual structure. Extending into the body 21 from a sidethereof is a conduit 23, said conduit terminating in a contracted jetnozzle 24 directed axially upwardly through the passage 26 of the body21, which passage is preferably enlarged between the ends thereofwhereby the ow of incoming water about the nozzle 24 is facilitated.Preferably, and as shown, the conduit 23 and nozzle 24 form integralportions of the body member 21 and a threaded o ening is provided at theouter endof the con uit passage for the recepjtion of the pipe 14.,

The"innember 22, it is noted, comprises collars 27 and 28 arranged forthreaded engagement with the lower end of the pipe 6 and the upper endofthe body 21, respectively, and these collars are provided withoutwardlyl extending annular flanges 29 and 31 at t eir opposed ends. Asleeve member 32 is utilized for drawing the collars 27 and 28 towardeach other, lsaid sleeve being arranged day of May, 1928.

to threadedly engage one of the collar flanges and having an inwardlyextending flange 33 for engagement behind the other collar flangchasshown, the sleeve vflange 33 is engaged behind the cQllar flange `29 andis threadedly engaged with the collar flange 31 whereby the collars maybe releasably clamped together in axial alignment.

It will now be noted that the injector structure also includesva'discharge tube 34 of less diameter than the bore of the suction pipe6 v and having coterminous and generally conically tapered bore portions36 and37 defined thereinV with their larger ends at the extremities ofthe tube. The bore portion 36, it is noted, extends for the greater partof the length of the tube whereby the inclination of the bore walls tothe tube axis is relatively small, while the walls of the bore portion37 make an angle of about forty-five degrees with the bore axis. Formedat the i11- ner end of the tube 34 is an annular flange 38, said flangebeing arranged for disposal between the opposed ends of the collars 27and 28 whereby the tube may be engaged and held in fixed coaxialrelation to the pipe 4 and jet nozzle 24.

Preferably, and as shown, more or less resilient gaskets 39 arelinserted between the tube flange 38 and the opposed ends of the collars27 and 28, it now being clear that the tube 34 is arranged to be securedin place by and upon' a screwing up of the sleeve 32k on the threads ofthe collar flange 31.V By

varyinglthe thickness of the gaskets 39, ad-

justment of the relation of the inner end of the tube 34 to the tip ofthe nozzle 24 may be effected, it being noted that said end and tipshould be in substantially coplanar relation as shown, some adjustmentof their relation being usually necessary for different lifts. Fordeeper wells, the tip of nozzle 24 is adjusted to lie well within thebore portion 37 of the discharge nozzle 34.

The injector unit now described, it will be noted, has been foundparticularly satisfactory and efficient under a wide variety ofconditions of use. And, furthermore, the simplicity of structure andease of assembly are also noteworthy features of the device.

l claim: v

In a pump, a pipe through which li uid is pumped, a collar surroundingan en of said pipe, a discharge tubevwithin the pipe, another pipe, acollar on one end of the second pipe, an annular flange onf/the tubeengaged between said collars, a coupling'sleev'e surrounding anddetachably joining said col'- lars, and an injector nozzle' intheksecond' named pipe and arranged fo discharge into said tube.

1n testimony whereof, I have hereunto set my hand at` Oakland,California, this 28th EMANEL A. sMrrH.

